I have the S3 cellullar/LTE, and when I left the house earlier this week I saw a signal strength indicator on the watch face. Today I ran out but didn't see the indicator or icon. I'm using the same watch face, so not sure why it's no showing up. FWIW I still had LTE connectivity as I could make a call from the watch. It's not critical but was nice to have & see when not on WiFi.